\begin{table*}[htbp]
\caption{Comparison between Optimal Tree Approach and Path-Tree Approach}
\label{realdatapathtree}
\begin{center}
\begin{tabular}{|l|r|r|r|r|r|r|r|r|r|}
\hline
 & \multicolumn{ 3}{c|}{Transitive Closure Size} & \multicolumn{ 3}{c|}{Construction Time (in ms)} & \multicolumn{ 3}{c|}{Query Time (in ms)} \\ \hline
 & \multicolumn{1}{l|}{Tree} & \multicolumn{1}{l|}{PTree-1} & \multicolumn{1}{l|}{PTree-2} & \multicolumn{1}{l|}{Tree} & \multicolumn{1}{l|}{PTree-1} & \multicolumn{1}{l|}{PTree-2} & \multicolumn{1}{l|}{Tree} & \multicolumn{1}{l|}{PTree-1} & \multicolumn{1}{l|}{PTree-2} \\ \hline
AgroCyc & 13550 & 997 & 2138 & 149.8 & 551.11 & 327.74 & 46.63 & 24.69 & 31.34 \\ \hline
aMAZE & 5178 & 1583 & 17274 & 1062.15 & 1603.58 & 114.85 & 19.48 & 28.93 & 71.04 \\ \hline
Anthra & 13155 & 757 & 2625 & 141.11 & 520.7 & 321.17 & 44.96 & 27.58 & 33.92 \\ \hline
Ecoo & 13493 & 1016 & 3598 & 151.46 & 549.2 & 328.89 & 46.67 & 28.16 & 31.5 \\ \hline
HpyCyc & 5946 & 4245 & 4079 & 57.38 & 222.92 & 132.74 & 31.54 & 25.96 & 23.47 \\ \hline
Human & 39636 & 977 & 2914 & 446.32 & 1527.22 & 995.47 & 70.11 & 42.85 & 45.71 \\ \hline
KEGG & 5121 & 1525 & 30344 & 746.03 & 1793.2 & 143.76 & 17.51 & 32.35 & 88.14 \\ \hline
Mtbrv & 10288 & 835 & 3665 & 111.48 & 406.56 & 242.58 & 40.39 & 24.55 & 33.28 \\ \hline
Nasa & 9162 & 4842 & 6622 & 85.29 & 248.89 & 117.59 & 37.04 & 28.78 & 33.96 \\ \hline
Reactome & 1293 & 386 & 1069 & 17.24 & 39.11 & 16.2 & 17.57 & 10.49 & 19.46 \\ \hline
VchoCyc& 10183 & 867 & 2259 & 109.47 & 403.87 & 237.23 & 40.03 & 21.51 & 28.52 \\ \hline
Xmark & 8237 & 2357 & 10612 & 204.76 & 467.5 & 138.59 & 37.83 & 26.39 & 54.76 \\ \hline
\end{tabular}
\end{center}
\end{table*}